#include<stdio.h>
#include<stdlib.h>
main()
{
	 struct Date 
	 {
	 	int month;
	 	int day;
	 	int year;
	 };
	 struct Student 
	 {
	 	int num;
	 	char name[20];
	 	char sex;
	 	int age;
	 	struct Date birthday;
	 	char addr[30];
	 };
 } 

